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Zur Nichtlinearität des Gehörs

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Two kinds of nonlinearity of the ear are studied. One of them refers to the hydrodynamical (Section 1), the other one to the frequency theory (Section 2). Excursions of finite amplitude produce on the partition wall of the cochlea secondary waves of higher harmonics or combination frequencies. Secondary waves of frequencies higher than the primary ones are suppressed, whereas secondary waves of lower frequencies (beat frequencies) generate separate maxima on the partition wall, as postulated by ‘place’ theory.

To understand nonlinearity, the frequency theory may be applied also to small amplitudes. The nerve impulses, which are connected to a certain phase of oscillation of the partition wall, may be integrated into a pulse, which is both amplitude- and phase-modulated. The pulse repetition frequency is equal to one of the primary frequencies, whereas the fundamental frequency of the phase- and amplitude-modulation is equal to the beat frequency of the first or higher order.
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Document Type: Research Article

Publication date: January 1, 1962

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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